Magnetic clutch or brake.



H. W. RAVENSHAW. MAGNETIC CLUTCH 0R BRAKE. APPLICATION FILED, MAR. 17,1908,

-Patented Beta. 7, 1909.

To all whom "it may caiacirn:

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an nnnmnnn.

fBeit known that l, HENRY WHMGE- Rlivnmsnaw, f Ruiland Hnnsn,Hn-inndcll,

in the county 0i? Middlcscml'iiiglnnl, have invented new 2zn&nsfiillmpigcvcmcnlnin 'Magnetic Cln'ichcs 01 Bmll cs, which ih followingis n specificniinn,

My invention rciatcg 'ln magnetic clnlcli% 0 bmijiccln same i; c(hereinafter termed the innmmiiatc ccment type) as set fcnlln in ilics'ecci fications filed in pugtsunnce m3 my applications farLcilcrsfi-nient, Scrial 1%, 359,995, 7

filed 28th Fe'inrnm'y, 190?, and 410,744,fi1e:l Jan 1 21 1308. I

My present invcnlinn dificm finm flint described in my pnicntspccificaiicn lay. namcil mainly iii-that the mngnclzizing coil, instwcl055 being placccl insialc'ilzc interme- (lintc elci'ncnlsg is placed, s0sis in sni'muncl the intermediate clcmnis. illy this means greatersimpliciiy anil ccnncmy 0f c0nslmctinn are obtninccl. Thai plates 0Kintcmnediate elements may be made very light and therefore particularlysuitable for minim cars. The invention is however applicable to a muchwizler'rangc of field ilnin motor cars. It is applicable icr :illPHZPQEQS of clutches and brakes of lhc intermediate ale-- ment type.

I shall now tlcscribc my invention with refercncc to the accompanyingdrawingsin 'wliich Figure"1 is a central section of mm form 0f my deviceand Fig. 2 a section 01* a mailification.

llcfcz'ringic Fig. 1 which illnsti'atcs a clutch constructed under mypresent invention and which is particularly applicable for motnicars lplace the W0 shafts 1, 2, driving: and driven, in iilinuncnt one oitlcse sniifts say the driven shaft "2 having a buns or extension piece 3to which the Slldfibly mounted intermediate clcmcrits 4, 5, 6 ateattached by keys 7. The other shaft ihc driving shaft 1 czu'rivs: theannular, recessed clcch'o-magnct 8 which contains in the recuss themagnetizing mil 9 (slipped in from the right as the. drawings Show) andcnncentric with the coil and within it are also the other inlcrmmiiniccicmnnls if), 11 which mvcmcnits in '13 of the kccpci',

milniv clczlmmagncn 'Iflzc l3 lies within zinnnmiian eizlcnsian' picccll of ihe clccim mngncn It is cnnccnti'ic with the inagnciic alimcizicnWithin llic said. extenswn "piccc. This cnlcnsicn plaza: farms part ofll c magnetic circuit and it is l3lldl in film clcntm -ningnci prnpci'by vlwlitq 16 S0 filial when rci ncvccl madly EL'BEES an the coil isQlDllliflMl. This limits which, clinch llic tension piccc in ilicclcclnwmagn prcpci" may alisc sewn in attach a plain in cnvca' I? for:ilic pinpcsac nil cxclwiing' (lint.

In Fig 25 ll SllOW m snmcwlini mnziilicai form (if my clutch Hcrc I lcmnkccpcn in iwo conccntnic parts l3, l8 fifibl the man ner described in mypziicnis spcciiicalion Sci. NO, 4.10mi lzclcic mcniicncil niilci part2;l8 lacing ire-2c in slicl bulls in ii'flil cm inncr 2mm sliding A outerpara, l8.

14 is made {claimant tin-m '5 l and it is ncl; in cnninci, z

By iliia in 13 cans a; bcibsi' rclcnsc is Oblfilfififi. alsw be seenthal, the clc-mcnln l0 ll are driven by keys 19 an the inside: 0i? inccoil former instcad cf by firiving pins in Figbll,

It is in inc lindelfiilmll'l that any cnnvcnicni nnmirci piintci'mcninic clan is; in

To enable the pails to open Gilliwhcn the clccim'magnci R63 longcicnci'gimzl scpnrating springs may be cinployccl ii (lcsii'cd.

in iLlllS figure i". will It, will be sccn ilml in my in v'cnlicn linilithc driving and the mlrivcn clcmcnis arc included in the magncliccircuit 21ml islml therefore both of these clement; sire )EOI'IHBLl ofor contain magnetic material.

Having thus (lesci'ibccl my invent-inn hale l claim as new and clcsircto sccnw by l; tars Patent is-- 1. A magnetic clnicli or brakecnmprising a driving and n driven shall, a bcsn cunnccting liie sim'fis,siidnlrly mcunlccl ini'crmedialc elements in pzn'l mounted 0n the boss,and ii magnelizing coil sui'i'cnmling the intcrn'imliaie elements,snbsinnlially as de- 5c '5 bcci.

A magnetic clutch an" b 'nizc cnmpiising set of intermediate elementscoacting periplr" alined driving and driven shafts, a hose connectingthe shafts, an annular, recessed electron'iagnet mounted on one of theseshafts, a magnetizing coil containcd'in the recess, and intermediateelements located within the magnetizin coil Which are secured to thedriving and driven shafts respectively, one

orally With the annular electromagnet, the other directly With the bosson the shaft, substantially as described.

3. A magnetic clutch or brake comprising alined driving and drivenshafts, an annular, recessed electromagnet mounted on one of the shafts,a magnetizing coil contained in the recess, an annular extension piecesecured to the electromagnet, a keeper sliding Within the annularextension piece, and intermediate elements, located Within the coil,which are secured to the driving and driven shafts respectively and areoperated by the keeper to couple the shafts, substantially as described.

.et.,.-A magnetic clutch or brake comprising alined driving and drivenshafts, an annular, recessed electromagnet incnnted on one of theshafts, a magnetizing coil conto this specification in the tained in therecess, an annular extension piece secured to the elect-romagnct, akeeper formed of two concentric parts, and intermediate elements ]ocatcdWithin the coil, which are secured to the driving and driven shaftsrespectively and are operated b the keeper to couple thc shafts,substantia ly as described.

5. A magnetic clutch or brake comprising alined driving and drivenshafts, an annular, recessed electroinagnet mounted on one of theshafts, a magnetizing coil. contained in the recess, an. annularextension piece secured to the elcctroinagnet, a keeper formed of twoconcentric parts, a cover, and intermediate elements located Within thecoil which are secured to the driving and driven shafts respectively andare operated by the keeper to couple the shafts, suhstantially asdescribed.

In Witness whereof I have signed my name presence of two subscribingWitnesses. q

' HENRY WILLOCK RAVENSIIAW. Witnesses F. L. RAND, i-L D. JAMEsoN.

